Good solid spec, components are nice.
You can as suggested shave off a few quid by going for the cheaper board but I'd stick to that one personally, if you plan to overclock or play with unlocking the 550's cores its one of the better boards, the AMD chips like it.
The PSU is slightly overkill with that system but will allow future upgrading and crossfiring at a later date.
If your overclocking you may want to look at an aftermarket cooler and possibly an intake fan for the case.
GPU is good, as Thrifles suggests, if your going to stretch for a better card, go for the 4890